Eh... Two examples in all of gaming then, Sharm.
Limbo (a game in which the entirety of the "graphics" are pure black silhouettes). And "Thomas Was Alone". Granted, I've never played either, but they receive pretty high acclaim from players and critics alike... Including as "good stories". Found two examples for you. But, if you mean "strictly RPGs". Well, I'd be hard pressed to find many RPGs that I'd even consider "good" to begin with. Not that I'm some curmudgeony guy who can't have fun with a game... it's just, it's really difficult for me to blur the lines between fantasy and reality for a video game, so it's much harder for me to "become invested" in what usually amounts to troperiffic characters, cliché storylines, predictable twists, and really weird/odd execution. I've played a lot of RPGs... your RPG has to be particularly special for me to proclaim it anything more than "mediocre". But, I guess if either of us really cared about that point enough, we could probably conduct google searches long enough to find games that fit the critera. Right now, all either of us is drawing on is anecdotal evidence and the "I haven't seen it, so it must not exist" mentality.
Completely false that's it's easy to obtain resources? Hmm... Open google... Type in "free VX Ace sprites" or whatever else you're looking for... blammo, you got some that were easy as a simple search to find. Our forums even have the same search function... Though, most people here rightly demand some kind of compensation for their work (especially if you plan to sell your game). Requesting the resources is as easy as simply making the post to ask for 'em and what you'd be willing to pay. I've seen people do recolors for free, though admittedly, I don't know how often that actually happens (that's not a part of the forums I spend a lot of time in). There are even tutorials for how to do recolors and alterations yourself along with people in this very topic telling everyone how easy those particular things are to do. So... yeah... custom content is fairly easy to obtain. Now, if you're talking "high quality custom content", then yeah, much harder to obtain. Almost never free either.
Eh, about the book argument... No, most book stores actually separate their books by what they are. Cook books. Fiction. Non-fiction. Fantasy. Sci Fi. Murder mystery. Romance. Etcetera. I choose the section of books I want to look at (what I'm in the mood to read, or what I prefer to read in terms of content) and then look for other criteria. If I want a book that will last a while, I look at thicker ones. If I want one as just a "quick read" or a "cheap buy" so I can get multiple books, I look through thinner books. If I'm looking for something completely unexpected, yes, I will go through pretty much every book in the section I'm looking for. I'll read the back, see if it's something that sounds unique or interesting, and pick it up if I like it. I don't ever once use the title or the cover to decide what I'm going to read. Why? I've been surprised enough by all forms of media that I've learned "don't judge a book by it's cover" isn't just some hokey line people aspire to and never do... No, it's fantastic advice.
Aesthetics is not the same as "custom content". Aesthetics is how well things appear as well as how well they match to each other... It can be custom content, sure, but it's not limited to that. You can achieve pretty good Aesthetics with just the RTP if you know what you're doing with mapping and such. As for "removing aesthetics completely and still get an amazing game". Well, I point you to text adventures. I point you to dwarf fortress. The "graphics" of those games are all imagined (unless you load up your own texture pack into Dwarf Fortress... which is your choice... but a lot of people who play, don't do that). It is possible to "remove all graphics" and make a great game. It's just that, such a thing really isn't your taste... Or the taste of current gamers, so it goes ignored or is cited as "stupid". Gamers, currently, are in favor of spectacle instead of using any form of imagination. While gaming is a very visual medium, some things can be left to imagination. Do you really need blood and gore to indicate death or to scare someone? No, you don't. You can accomplish that with atmosphere. Graphics help. Yes they do. They are important. Yes, they are. My point is not "remove them entirely". My point is and always has been, "It's not always or even often necessary to flashy content, or even custom content not contained in the RTP".
Oh, and no, I didn't ignore your arguments just to keep arguing. I just picked the ones that were relevant to reply to (IE: The ones I didn't agree with). If you think I "ignored" some portion of your post, just assume I agree with it. You did say "If a game hasn't made any effort to do anything but use the out of the box visuals, I won't even pick it up". You continued trying to hammer that point home without ever once stating, "It's really how they use the RTP that matters to me". Nope, you said, "I won't pick up a game if all it uses is the RTP". I don't know about you, but that says to me, "no custom content? I'm not even going to give your game a chance!" That's what I've been arguing against the entire time. Complain that I "ignore your posts" all you want, but you said it. Seriously, it's the same post you said you agreed with that other guy. I read it, I found it more than a little condescending and childish, and took offense to it. But, instead of being a raving jerk about it, I tried to nudge you into at least agreeing that such a standpoint was somewhat silly, as you should be judging games (or indeed trying them out) based on more than some screenshot or short video.
Actually, here's where I think we're getting hung up on the entire argument:
If all you're using is the RTP, it isn't really that big of a deal. Unless you want to charge money for it. If your RTP only game is free or dirt cheap... Well, people are more inclined to at least give it a try, despite what they perceive as "bad graphics". Human standards come into play when you start asking someone to drop $10 or more on your game that you haven't even upgraded the graphics on. People then perceive the lack of custom content as "not worth the money I'd spend on the game". But, if they were told, "You can get this game for $1", they have a much higher chance of going, "Eh, sure, I need something new to play, a dollar is pretty cheap, I'll give a shot, maybe it'll be fun". In that case, graphics aren't what sold the game.
In fact, what sells any game (whether you're charging $0 or $100) is perceived value by the customer. That's the reason F2P exists. "Oh, this game is free? Sure, I'll download it and play it". Next thing a player knows, they've dropped $20 on it.
If all games were sold according to their content, then RTP only games for free or for less than $5 is great value to a consumer and so it wouldn't matter much that all you're using is "out of the box" materials. But, if you were looking to charge $20 or more on your product... Well, you need a lot of custom content (not just graphics! You'd need scripts, sounds, music, menus, etcetera!) to convince a customer that your game is worth the $20 you're asking for it.
So, to really sum up the whole argument:
It's what you do with RTP that matters, not the fact that it's all you're using. The exception is if you're trying to sell it, in which case, you need to put a lot of work into it to convince a customer that it's worth what you're asking. Custom content helps you sell your game to people who want more perceived value from a game, but it isn't entirely necessary to create a good game. Custom content is your packaging and it can be either good or bad, depending on its use as well. Dismissal of any game "out of hand" by a player because of "used only RTP" or "it doesn't look good" is really silly and you don't want those kinds of players anyway. If a player says, "these maps are designed pretty horribly", then that's good criticism of your game that doesn't rely on people who are "Graphics Snobs". After all, a blank featureless corridor is boring in any resolution with any amount of detail of the walls.
If your game is cheap or free, no, there's zero wrong with using the RTP. If you plan to charge a decent chunk of money... Well, you need to hire an artist to get the "perceived value" up on your product to get people to part with their cash.